No CrossRef data available.
Published online by Cambridge University Press: 03 November 2016
1. We deal with the equation
where ψ(ωt)is continuous, periodic in t with period 2π/ω a, k2 are real and positive, and
A stable (bounded) solution was given by Erdélyi in 1934 employing a complicated transformation and integral equations.
We shall obtain this solution by an elementary method, thereby reducing the analysis to one-third of its former length.